Floor-scraper.



FFTC.

WALTER F. STERN, 0F READING, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO JAMESH. KNOLL, OF READING, PENNSYLVANIA.

FLOOR-SCRAPER.

To all whom it may concern.

Be it known that T, lVAL'rnr. F. STERN, citizen otl the United States,residing at Reading, in the county of Berks and Stat-e ot' Pennsylvania,have invented certain new and useful Improvements in Floor-Scrapers, otwhich the following is a specification.

This invention relates to improvements in floor scrapers and the objectis to provide a device with a scraper blade at either end withaswinging' handle; one in which the blade carrying heads are adjustableverticalljv and longitudinally, and one in which the blades are easilyadjusted in their holders.

A. further object is to provide a device in which the entire bladeholder is readily removable trom the machine so that the blade may besharpened without removing it from the holder or interfering with itsadjustment therein.

Another obj ect is to provide means for securely clamping the blade. inthe hold-er until it has been consumed, by grinding and sharpening, toapproximately one-third ot its original size.

Provision is also made for operating the device in places where thehandle would not ordinarily permit its use.

The invention is more fully described in the following specification andclearly illustrated in the accompanying drawing, in which :h

Figure 1 is a plan view ot my machine. F'g. 2 is a side elevationthereof, showing one of the blade carrying heads in section.

The numeral 1 designates the frame; 2 the wheels on which it is mountedand 3 the operating handle which is provided with a latch L1 and a rod 5for operating the latch.

The numeral G designates a rack adapted to be engaged by said latch.

The numeral 7 designates the blade carrying heads. There are two ofthese heads, one at either end of the machine. These heads are made upof a block S provided with a knuckle joint 9 working' in a seat in theframe where they are held in position between ears 9il by means of a pin9b and these blocks are each formed with an upward extension 10 which issecured to a toothed quadrant 11 whose. teeth engage a pin 12 on thetrame. The opposite extremity of this quadrant is provided with a handle13 and by means of it the head is ad- Specicaton of Letters Patent.

Application filed April 22, 1399.

Patented Apr. 19, 1910. sel-iai No. 491,431.

justed vertically, for by moving the toothed portion ot the quadrant ineitherl direction, with relation to the pin 12, the head will rock int-he oint 9 and either raise or lower the outer extremity, in which thescraper blade is carried.

The numeral 14 designates the blade holder. 'This is composed of a bodyhaving l a pair of aw members 15 adapted to be removably pivoted to thehead 7 by means ot a centrally disposed bolt 16. This pivotal connectionpermits the entire blade holder to swing to either side, thus providinglateraladjustment of the blade, allowing' it to be set at an angle,other than right angles, to the longitudinal center line of the machine,that is, to the general direction in which the machine travels. Thisadjustment is desirable in the event of scraping a crossgrained surface.

The numeral 17 designates the scraper blade and 18 the backing platetherefor. The blade lies on the holder 14 and a pair of set screws 19 inthe upper edge of the holder, bear against the rear edge of the bladeand serve to adjust the blade in the holder.

The numeral 20 designates a clamping plate. This plate is interposedbetween the backing plate and the holder and bears against the uppersurface of the blade. On the backing plate 1 provide a screw 21 torsecuring the blade in the holder. This screw bears against the plate 20and the plate bears against the blade, thus holding it securely. Thisconstruction permits the blade to be used until it has been almostentirely consumed and long' after it has passed from the point wheredirect engagement with the screw 21 would be possible.

It is evident that in my device the handle may be placed so that themachine may be operated from either end. This is accomplished by thelatch in the handle engaging the toothed surface of the rack, and thislatch may be operated by the rod 5 which. may project entirely throughthe handle if desired or may be operated from a projection on said rodat any suitable point in its length. dien the handle is thus placed, itwill hold securely while the machine is being operated.

When it is desired to operate the scraper in a place too small to permitof the usual manner of moving it, the handle is placed in verticalposition and the operator grasps one oii' the supplemental handles 22,by means of which a short stroke may be secured advantageously.

The adjustment of the blade in the holder is easily accomplished bymeans of the set screws 19 after which the screw 2l is tightened,securely holding it in position.

The vertical adjustment oif the blade carrying head is just as easilyaccomplished, by grasping the handle 13 and moving it in its joint 9,after which the toothed end of the quadrant l1 is made to engage the pinl2.

The lateral adjustment of the blade holder is readily accomplished byloosening the bolt 1G and turning the holder to either side, and thensecuring it by again tightening the bolt. This lateral adjustment isnever very great and as shown in the drawing, provision is made only fora very limited movement in this manner. lt is also clear that the entireblade holder may readily be removed from the machine, by merely removingthe bolt 1G, thus allowing the blade to be sharpened with ease andgreater accuracy, and without interfering in the least with itsadjustment in the holder.

Having thus fully described my invention, what claim and desire tosecure by Letters Patent is l. in a floor scraper, a frame mounted on jwheels, a removable and laterally adjustable l blade holding headsecuredY to either end of the frame, a swinging handle, a bolt and rackfor locking the handle in dierent positions, a toothed rack and anengaging pin for securing vertical adjustment ot' the blade holders, andset screws for adjusting the blades in the holders.

2. In a iioor scraper, a iframe mounted on wheels, a swinging operatinghandle, a toothed rack, releasable means on said handle for engagingsaid rack, an adjustable block secured to either end of the frame, a pinon the frame, a toothed quadrant adapted to engage said pin at diiierentpoints in its length and connected to said block, said block beingformed with a knuckle joint where it is connected to the frame, alaterally adjustable blade holder removably secured to each of saidblocks, a scraper blade in each holder, means for adjusting the bladesin the holders, backing plates, clamping plates, and means for pressingthe clamping plates against the blades.

In testimony whereof I aiiiX my signature, in presence of two Witnesses.

VALTER F. STER-N.

lVitnesses ED. A. KELLY,

ROBT. M. KLrNE.

